| 婆婆纳、离子草与小花糖芥三种麦田杂草吸收NO_3~-,H_2PO_4~-,K~+的动力学研究 |
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| 引用本文： | 尹力初,张杨珠,周卫军,毛政国.婆婆纳、离子草与小花糖芥三种麦田杂草吸收NO_3~-,H_2PO_4~-,K~+的动力学研究[J].土壤通报,2007,38(1):68-71. |
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| 作者姓名： | 尹力初 张杨珠 周卫军 毛政国 |
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| 作者单位： | 1. 湖南农业大学,资源环境学院,湖南,长沙,410128
2. 湖南省武冈县农业局,湖南,武冈,422400 |
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| 基金项目： | 湖南农业大学校科研和教改项目 |
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| 摘 要： | 采用耗竭法,研究了婆婆纳、离子草与小花糖芥三种麦田常见杂草吸收NO3-、H2PO4-、K+的动力学差异。试验结果表明:在吸收NO3-、H2PO4-、K+时,婆婆纳的Vm ax值要显著高于其它两种杂草;在吸收H2PO4-时,离子草的Km值要显著低于其它两种杂草;而在吸收K+时,却是小花糖芥的Km值最低。从而说明:三种杂草中,婆婆纳最能适应高N、P、K养分条件,离子草最能适应低P养分条件,而小花糖芥则最能适应低K养分条件。
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| 关 键 词： | Vmax Km 杂草 |
| 文章编号： | 0564-3945(2007)01-0068-04 |
| 修稿时间： | 2006年2月8日 |
NO3-, H2PO4- and K+ Uptake by Three Weed Species, Erysimum cheiranthoides,Chorispora tenella, and Veronica agrestis in Winter Wheat Cropping Land |
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| YIN Li-chu,ZHANG Yang-zhu,ZHOU Wei-jun,MAO Zheng-guo.NO3-, H2PO4- and K+ Uptake by Three Weed Species, Erysimum cheiranthoides,Chorispora tenella, and Veronica agrestis in Winter Wheat Cropping Land[J].Chinese Journal of Soil Science,2007,38(1):68-71. |
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| Authors: | YIN Li-chu ZHANG Yang-zhu ZHOU Wei-jun MAO Zheng-guo |
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| Abstract: | Using ion depletion technique,a kinetic study of NO3-,H2PO4-and K uptake by three weed species,E cheiranthoides,C tenella,and V.agrestis was carried out.The results showed that V.agrestis had the highest Vmax value among the three weed species for the uptake of NO3-,H2PO4-and K ;while C.tenella and E.cheiranthoides had the lowest Km value for the uptake of H2PO4-or K .It was proved that V.agrestis is the most easily crowing weed species in high levels of N,P and K nutrient environment,while C.tenella and E cheiranthoides can grow better in P or K deficient environment. |
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| Keywords: | Vmax Km |
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